CN108207002B - Antenna design optimization method and device for indoor distribution system - Google Patents
Antenna design optimization method and device for indoor distribution system Download PDFInfo
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- CN108207002B CN108207002B CN201611184906.9A CN201611184906A CN108207002B CN 108207002 B CN108207002 B CN 108207002B CN 201611184906 A CN201611184906 A CN 201611184906A CN 108207002 B CN108207002 B CN 108207002B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
- H04W16/20—Network planning tools for indoor coverage or short range network deployment
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- H01Q—ANTENNAS, i.e. RADIO AERIALS
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- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses an antenna design optimization method and device for an indoor distribution system, wherein the method comprises the following steps: determining the type of a power divider connected between the first-stage nodes according to the preset number of the antennas, the target power value of each antenna in each system and the power loss value of the feeder line; the first-stage node is a node formed by an antenna and a feeder line connected with the antenna; acquiring a power value of an Mth level node according to the power value of the first level node; acquiring devices connected between the M-level nodes in a pre-reverse component selection mode according to the power value of the M-level nodes; acquiring a power value of an M +1 level node according to the power value of the M level node; and the rest is repeated until the node of the last stage is a device. The method of the invention improves the design efficiency and improves the accuracy of the antenna design optimization.
Description
Technical Field
The invention relates to a communication technology, in particular to an antenna design optimization method and device for an indoor distribution system.
Background
In the design of the indoor distribution system scheme, the power problem among different antenna points needs to be considered, a proper passive device is selected for connecting the antennas, the building area for building the indoor distribution system is generally large, the number of layers is large, the number of the antennas often reaches hundreds, after the level value of the antennas is predicted, the power value of the antennas is enabled to be close to an expected target value through a manual selection device (such as a power divider, a coupler and the like) or a mode of adjusting the nominal value of the device, the calculated amount is large, the power coordination problem among different associated antennas is involved, and the optimal combination is difficult to find through the manual adjustment mode.
Part of indoor distribution system design tools provide auxiliary optimization schemes, but the tools are only suitable for scenes that all antennas only can adopt the same optimization target value, the optimization precision is poor, the deviation of the optimization effect from the optimization target is large, the requirement of fine design of designers is difficult to meet, and the precision and the flexibility of the design scheme are poor.
At present, when a designer designs an indoor distribution system scheme, the source power, the device and the antenna are often selected autonomously according to experience, so that high requirements are provided for the professional level of the designer, and the designer is difficult to accurately and reasonably select by the experience alone, so that the difference between the actual effect and the expected value is often large. Some indoor distribution system design tools with design scheme optimization based on level values can only set the same target power value for all antennas, and cannot support different optimization targets set for different antennas according to coverage and other special requirements. Meanwhile, the accuracy of the optimization result of the existing tool is low, and the deviation from the target value is large, so that the accuracy of the design scheme is influenced, and the coverage effect of an indoor distribution system is also greatly influenced.
Disclosure of Invention
In view of the above, the present invention provides an antenna design optimization method and apparatus for an indoor distribution system, which overcomes or at least partially solves the above problems.
To this end, in a first aspect, the present invention provides an antenna design optimization method for an indoor distribution system, including:
determining the type of a power divider connected between the first-stage nodes according to the preset number of the antennas, the target power value of each antenna in each system and the power loss value of the feeder line; the first-stage node is a node formed by an antenna and a feeder line connected with the antenna;
acquiring a power value of an Mth level node according to the power value of the first level node; the Mth level node is a node formed by connecting the Mth-1 level node and the Mth-1 level node;
acquiring devices connected between the M-level nodes in a pre-reverse component selection mode according to the power value of the M-level nodes;
acquiring a power value of an M +1 level node according to the power value of the M level node, wherein the M +1 level node is a node formed by the M level node and a device connected with the M level node;
repeating the steps until the last level node is a device;
wherein M is a natural number of 2 or more.
Optionally, the method further comprises:
aiming at the power value of the last level node in each system, acquiring the power value of each antenna in the system;
and adjusting the power values of the devices connected with all the nodes in a forward optimization mode, and taking the adjusted power value of each device as the target power value of each device.
Optionally, the step of determining the type of the power divider connected between the first-stage nodes according to the preset number of antennas, the target power value of each antenna in each system, and the power loss value of the feeder line includes:
when at least two systems exist, determining the power value of a first-level node under each system according to a formula I for each system;
the formula I is as follows: the first-stage node power value is equal to the target power value of the antenna and the power loss value of the feeder line;
grouping all the first-level nodes under each system according to the power value of the first-level nodes in each system to obtain the grouping of the first-level nodes under each system;
solving the intersection of all system groups to obtain a subset in the first-level node set;
selecting the power divider type connected with all elements in each subset according to the number of the elements in each subset;
Wherein the number of elements in each subset is less than or equal to 3.
Optionally, the step of determining the type of the power divider connected between the first-stage nodes according to the preset number of antennas, the target power value of each antenna in each system, and the power loss value of the feeder line includes:
when one system exists, determining the power value of a first-level node under the system according to a formula I;
the formula I is as follows: the first-stage node power value is equal to the target power value of the antenna and the power loss value of the feeder line;
grouping all first-level nodes in the system according to the power value of the first-level nodes in the system to obtain groups of the first-level nodes in the system, and taking the groups as subsets in a first-level node set;
selecting the power divider type connected with all elements in each subset according to the number of the elements in each subset;
wherein the number of elements in each subset is less than or equal to 3.
Optionally, if the number of elements in the subset is 2, two elements in the subset are connected to two output ends of the two power dividers;
if the number of the elements in the subset is 3, connecting the three elements in the subset with three output ends of the three-power divider;
And if the number of the elements in the subset is 1, taking the elements as the next-level nodes to select corresponding devices.
Optionally, the step of obtaining the power value of the mth level node according to the power value of the first level node includes:
when M is 2, determining the power value of the second-level node according to a formula II for each system;
the formula II is as follows: the power value of the second-stage node is (the power loss value of the two power dividers is 2+ the power value of two first-stage nodes connected with the two power dividers)/2;
alternatively, the first and second electrodes may be,
the formula II is as follows: the power value of the second-stage node is (the power loss value of the three-power divider is 3+ and is connected with two first-stage nodes of the two-power divider)/3;
and if the first-stage node is not connected with the device, the power value of the first-stage node which is not connected with the device is used as the power value of the second-stage node.
Optionally, the step of obtaining devices connected between the M-th level nodes in a pre-reverse option manner according to the power value of the M-th level node includes:
sequentially selecting two Mth-level nodes according to the arrangement sequence of the Mth-level nodes, determining the absolute value of the power value difference of the two Mth-level nodes under each system, and acquiring the average value of the corresponding absolute values under all systems;
judging whether the average value is smaller than a preset power divider selection threshold value or not;
If the current value is less than the preset value, two power dividers are connected between the two Mth-level nodes;
otherwise, a coupler is connected between the two Mth-level nodes, and the difference between the absolute value of the power value difference between the straight-through end and the coupling end of the coupler and the average value is minimum;
and analogizing in sequence, and judging whether the number of the residual M-th level nodes is less than 2;
and if so, taking the rest M-th level nodes as M + 1-th level nodes to select corresponding devices.
Optionally, the step of obtaining the power value of each antenna in each system according to the power value of the last node in each system includes:
if two systems exist, the power value of the last-stage node P in the first system is P 'and the power value P' in the second system, and the power value of each antenna in the first system is obtained according to the power value of the middle-stage node and the power value of the insertion loss
Power value under second mode
Correspondingly, the step of adjusting the power values of the devices connected to all the nodes by adopting a forward optimization mode and taking the adjusted power value of each device as the target power value of each device comprises the following steps:
obtaining an adjusting parameter x 'under a first manufacturing mode and an adjusting parameter x' under a second manufacturing mode by adopting a formula III;
The formula III is as follows:
according to the adjustment parameter x 'under the first mode and the adjustment parameter x' under the second mode, the power value of the last-stage node P under the first mode is adjusted to be P '+ x', and the functional value under the second mode is adjusted to be P '+ x'; and
adjusting the power level of each antenna in the first mode to
The power value under the second mode is adjusted to
And adjusting the power level of each device between the antenna and the last stage node accordingly.
Optionally, the device connected between the M-th level nodes is a two-power divider or a coupler;
and the device connected between the M +1 stage nodes is a two-power divider or a coupler.
In a second aspect, the present invention provides an apparatus for optimizing an antenna design of an indoor distribution system, including:
the determining unit is used for determining the type of the power divider connected between the first-stage nodes according to the preset number of the antennas, the target power value of each antenna in each system and the power loss value of the feeder line; the first-stage node is a node formed by an antenna and a feeder line connected with the antenna;
the power value obtaining unit is used for obtaining the power value of the Mth level node according to the power value of the first level node; the Mth level node is a node formed by connecting the Mth-1 level node and the Mth-1 level node;
The device acquisition unit is used for acquiring devices connected between the M-level nodes in a pre-reverse component selection mode according to the power value of the M-level nodes;
the power value obtaining unit is further configured to obtain a power value of an M +1 th level node according to the power value of the M-th level node, where the M-th level node is a node formed by the M-1 th level node and a device connected to the M-1 th level node;
repeating the steps until the last level node is a device;
wherein M is a natural number of 2 or more.
According to the technical scheme, the method and the device for optimizing the antenna design of the indoor distribution system sequentially select the devices connected between each level of node through the target power value of each antenna under different systems, and finally converge all the antennas on one node, so that the selection of the devices and the determination of the power value of each device are realized, the design efficiency is improved, the accuracy of the antenna design optimization is improved, particularly, the joint optimization of different systems can be realized, and the multi-system balance under the multi-system co-construction scene is realized.
Drawings
Fig. 1 and fig. 2 are schematic flow diagrams of an antenna design optimization method for an indoor distribution system according to an embodiment of the present invention;
FIG. 3 is a flow chart of a first-level node grouping according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of obtaining intersections for the packets of different standards in FIG. 3;
fig. 5 is a schematic flow chart of an mth-level node selection device according to an embodiment of the present invention;
fig. 6 and fig. 7 are schematic flow diagrams of an antenna design optimization apparatus of an indoor distribution system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention.
At present, an indoor distribution system antenna design scheme is divided into two parts, namely a plan view design part and a system diagram design part, and a conventional design flow is 'plan view design- > system diagram generation according to a plan view- > system diagram optimization- > material statistics according to a system diagram- > drawing and a material list are handed to a construction party'. The method for optimizing the design scheme based on different coverage requirements of the antenna, provided by the embodiment of the invention, is mainly used for optimizing a system diagram, and can realize the optimization of different target values among indoor distribution systems and among antennas under the condition of co-construction sharing of different systems by adopting a scheme of 'reverse option' or 'reverse option + forward optimization'.
As shown in fig. 1, fig. 1 is a schematic flowchart illustrating an antenna design optimization method for an indoor distribution system according to an embodiment of the present invention, and as shown in fig. 1, the method of this embodiment includes the following steps.
101. Determining the type of a power divider connected between the first-stage nodes according to the preset number of the antennas, the target power value of each antenna in each system and the power loss value of the feeder line; the first-stage node is a node formed by an antenna and a feeder connected with the antenna.
It should be noted that all devices connected between the first-stage nodes are power dividers, and the types of the power dividers in this step include: a two-power divider and a three-power divider.
Generally, the power dividers connected between the first-stage nodes all use two power dividers or three power dividers.
The power divider of the embodiment is called a power divider, and is a device for dividing one path of input signal energy into two paths or multiple paths of output equal or unequal energy. Certain isolation degree should be guaranteed between output ports of one power divider. The power divider is generally divided into two-in-two (one input and two outputs, two power dividers), three-in-three (one input and three outputs, three power dividers) and the like according to the output.
In this embodiment, the output ends of the power dividers are respectively connected between the first-stage nodes.
102. And acquiring the power value of the Mth level node according to the power value of the first level node.
The M-level node is a node formed by connecting the M-1-level node and a device connected with the M-1-level node.
For example, if M is 2 and a two-power divider is connected between two adjacent first-stage nodes, the first-stage node connecting two output ends of the two-power divider and the two-power divider form a second-stage node;
and if M is 3 and the three adjacent first-stage nodes are connected with each other, the first-stage nodes connected with the three output ends of the three power dividers and the three power dividers form a second-stage node.
Of course, if the number of the first-level nodes is 1 and no device is connected, the first-level node is directly used as the second-level node to participate in the selection of the following devices.
103. And acquiring devices connected between the M-level nodes by adopting a pre-reverse component selection mode according to the power value of the M-level nodes.
In this embodiment, the device connected between the mth-stage nodes is a two-power divider or a coupler; and the device connected between the M +1 stage nodes is a two-power divider or a coupler.
104. And acquiring the power value of the (M + 1) th level node according to the power value of the (M) th level node.
The M + 1-level node is a node formed by the M-level node and a device connected with the M-level node.
And the rest is repeated until the node of the last stage is a device.
In this embodiment, if M is 3 and two power dividers are connected between two adjacent second-stage nodes, the second-stage nodes connected to two output ends of the two power dividers and the two power dividers form a third-stage node;
if M is 3 and a coupler is connected between two adjacent second-stage nodes, the second-stage node connected to the through end of the coupler, the second-stage node connected to the coupling end of the coupler, and the coupler constitute a third-stage node.
Determining the last level node in a sequential manner may be referred to as a rendezvous point.
In the above embodiment, M is a natural number of 2 or more.
According to the method, the devices connected between each level of node are sequentially selected through the target power value of each antenna in different systems, and finally all the antennas are converged onto one node, so that the selection of the devices and the determination of the power value of each device are realized, the design efficiency is improved, the accuracy of antenna design optimization is improved, particularly, the joint optimization of different systems can be realized, and the multi-system balance under the multi-system co-construction scene is realized.
Optionally, for better optimization of antenna design, this embodiment further includes step 105 and step 106 described below on the basis of fig. 1, as shown in fig. 2.
105. Aiming at the power value of the last level node in each system, acquiring the power value of each antenna in the system;
106. and adjusting the power values of the devices connected with all the nodes in a forward optimization mode, and taking the adjusted power value of each device as the target power value of each device.
Aiming at the problem that different target values of antenna power in the existing indoor distribution system cannot be optimized during the implementation of the related scheme, the design scheme can be optimized in a one-key mode by setting the same or different target power values for the antennas in a mode of 'reverse selection and forward optimization', and meanwhile, the joint optimization of different systems is supported, the optimization process is simple, and the result is reasonable. Furthermore, the method can realize the function of autonomously optimizing the design scheme based on the requirement of the coverage target power value (namely the level value), can ensure the rationality of selecting the device and the information source power, can improve the design efficiency, and can greatly improve the coverage effect of the indoor distribution system from the perspective of the design scheme.
For example, in an alternative implementation, the step 101 may specifically include the following sub-steps 1011 to 1014 that are not shown in the figure:
1011. and when at least two systems exist, determining the power value of the first-level node A in each system according to a formula I for each system.
The formula I is as follows: and the first-stage node A power value is equal to the target power value of the antenna and the power loss value of the feeder line.
For example, according to the designerThe total number of antennas is preset as I according to different power requirements of different systems of the antennas, and the optimized target power value of the antenna of the system N 'is preset as { N', taking two systems of N 'and N' as examples1'，N'2，……，NI' standard N ' antenna optimized target power value is { N '1，N”2，……，N”I}；
In this embodiment, an antenna and a feeder connected to the antenna are combined to serve as a first-stage node a, and at this time, an input power value of the first-stage node a in each system is determined, as described in the first formula.
Respectively obtaining power values { A of first-stage nodes A of the standard N1',A'2,…,AI'} and system N' power values { A } of first level node A "1,A”2,…,A”I}。
It should be noted that the units in the formula one are dBm, and the feeder loss in the formula one is a preset parameter.
1012. All the first-level nodes under each system are grouped according to the power value of the first-level node A in each system to obtain the grouping of the first-level nodes A under each system, as shown in FIG. 3.
In the step, for each system, grouping I antennas according to the difference of the power values of a first-level node A, and setting a threshold value X of the power difference as a basis of first-level grouping;
and judging whether the power value difference values of the adjacent first-stage nodes A are all lower than a threshold value X, if so, grouping the adjacent first-stage nodes into a group, and otherwise, sequentially judging all the first-stage nodes A.
If the number of the first-stage nodes in the grouped group is 1, the first-stage nodes do not perform any processing at this time and directly enter the next stage.
It should be noted that, in practical design, the power dividers are generally used in two-power dividers and three-power dividers, and therefore, the combination of three first-stage nodes is considered at most when selecting the devices. The specific grouping is shown in fig. 3.
The order of the first-stage nodes in this embodiment is according to the arrangement order of the antennas.
1013. And (4) solving the intersection of the groups of all the systems to obtain the subset in the first-level node A set, as shown in FIG. 4.
In this embodiment, the number of elements in each subset is less than or equal to 3.
In this embodiment, after completing grouping in sequence according to the flowchart shown in fig. 3, devices used between first-level nodes are determined, for example, if there are 2 nodes in a group, a two-way power divider is used for connection; if 3 nodes exist in the grouping, the three power dividers are adopted for connection. The nodes mentioned in fig. 3 are all first level nodes.
And for the condition that multiple systems exist, the systems N 'and N' are respectively grouped, after the systems are grouped, intersection of each group is solved, the final grouping condition is determined, and the type of the power divider is determined according to the number of nodes in each group. The way of grouping and intersecting different systems is shown in fig. 4.
1014. And selecting the power divider type connected with all the elements in each subset according to the number of the elements in each subset.
It should be noted that, if the number of elements in the subset is 2, two elements in the subset are connected to the two power dividers;
if the number of the elements in the subset is 3, connecting the three elements in the subset with a three-power divider;
and if the number of the elements in the subset is 1, taking the elements as the next-level nodes to select corresponding devices.
In addition, for the case of one standard, the step 101 may specifically include the following sub-steps 1011a to 1014a not shown in the figure:
1011a, determining the power value of the first-level node A under the system according to the formula I.
The formula I is as follows: and the first-stage node A power value is equal to the target power value of the antenna and the power loss value of the feeder line.
1012a, grouping all the first-level nodes in the system according to the power value of the first-level node A in the system to obtain the grouping of the first-level node A in the system, and taking the grouping as a subset in a first-level node A set.
Note that the number of elements in each subset is equal to or less than 3.
1013a, according to the number of elements in each subset, selecting the power divider type connected with all elements in the subset.
Specifically, if the number of elements in the subset is 2, two elements in the subset are connected to the two power dividers;
if the number of the elements in the subset is 3, connecting the three elements in the subset with a three-power divider;
and if the number of the elements in the subset is 1, taking the elements as the next-level nodes to select corresponding devices.
In this embodiment, after the first-level node corresponding device is selected, the power values of the second-level nodes are respectively calculated according to the power values of the previous-level nodes in the group according to the system, and when the power values of the current level calculated by the previous-level nodes are different, the unique power values of the second-level nodes in different systems are determined after averaging. Specifically, step 102 is described in detail below.
For example, if M is 2, for each standard, the power value of the second-level node B is determined according to formula two;
the formula II is as follows: the power value of the second-stage node B is (the power loss value of the two power dividers is 2+ the power values of the two first-stage nodes connected with the two power dividers)/2;
that is to say, the power value of the second-stage node B is obtained by dividing the power value of the two first-stage nodes + the power loss values of the two second power dividers, which are respectively connected to the two output ends of the two power dividers, by 2.
Or, the formula two: and the power value of the second-stage node B is (the power loss value of the three power divider is 3+ and connects two first-stage nodes of the two power dividers)/3.
That is to say, the power value of the second-stage node B is obtained by dividing the power value of the three first-stage nodes + the power loss value of the three power dividers, which are respectively connected to the three output ends of the three power dividers, by 3.
And if the first-stage node is not connected with the device, the power value of the first-stage node which is not connected with the device is used as the power value of the second-stage node.
That is, the nodes not participating in the packet in the first level nodes and the nodes grouped and connected to the devices (included in the feeder lines connected to the devices) are collectively made up the second level node B. Respectively obtaining power values { B of second-stage node B of standard N 1',B'2,…,B'HAnd the system N "Power value at second level node B { B"1,B”2,…,B”H}。
Starting from the second-stage node, when selecting devices, the first-stage node generally adopts different power dividers, and the second-stage and later nodes are generally connected in a manner of combining the power dividers and couplers. This patent designs a scheme for power divider, coupler device selection and coupler coupling degree index selection, as shown in fig. 5. Considering the coordination problem among different systems, when selecting a device, the power divider and the coupler only consider the combination of two adjacent nodes, and when selecting a device in each node combination, consider the influence of multiple systems, and comprehensively select the device.
As shown in fig. 5, the step 103 may specifically include the following sub-steps 1031 to 1033 not shown in the figure:
1031. and sequentially selecting two M-level nodes according to the arrangement sequence of the M-level nodes, determining the absolute value of the power value difference of the two M-level nodes under each system, and acquiring the average value of the corresponding absolute values under all the systems.
1032. And judging whether the average value is smaller than a power divider selection threshold value XX, if so, executing a step 1033, and otherwise, executing a step 1034.
1033. If the average value in step 1032 is smaller than the power divider selection threshold value XX, two power dividers are connected between the two mth-level nodes;
1034. otherwise, a coupler is connected between the two Mth-level nodes, and the difference between the absolute value of the power value difference between the straight-through end and the coupling end of the coupler and the average value is minimum;
and analogizing in sequence, and judging whether the number of the residual M-th level nodes is less than 2; and if so, taking the rest M-th level nodes as M + 1-th level nodes to select corresponding devices.
Therefore, power values of the nodes subjected to grouping and merging are calculated according to the modes, step 104 is executed as above, the power values of the nodes at the upper stage entering the newly determined node at the current stage are distributed according to the selected devices, when the power values of the nodes at the current stage are different due to calculation of the power values of different nodes at the upper stage, the unique power value of each node at the current stage in different modes is determined by an averaging method.
In this embodiment, the defined nodes are combined step by step through the steps in the method described above until all the nodes converge to a connection point (i.e., a convergence point P, also referred to as a last-stage node P) and power values of different systems at the connection point are determined, thereby completing a reverse option operation.
Alternatively, in a fourth alternative implementation, the above steps 105 and 106 may be illustrated as follows:
if two systems exist, the power value of the last-stage node P in the first system is P 'and the power value P' in the second system, and the power value of each antenna in the first system is obtained according to the power value of the middle-stage node and the power value of the insertion loss
Power value under second mode
Correspondingly, obtaining an adjusting parameter x 'under a first manufacturing mode and an adjusting parameter x' under a second manufacturing mode by adopting a formula three and a formula four;
the formula III is as follows:
according to the adjustment parameter x 'under the first mode and the adjustment parameter x' under the second mode, the power value of the last-stage node P under the first mode is adjusted to be P '+ x', and the functional value under the second mode is adjusted to be P '+ x'; and
adjusting the power level of each antenna in the first mode to
The power value under the second mode is adjusted to
And adjusting the power level of each device between the antenna and the last stage node accordingly.
The forward optimization method is specifically explained as follows:
firstly, forward calculation is carried out according to power values P ' and P ' of different systems at a convergent point P, and the power value of each antenna system N ' is obtained through calculation after factors such as device loss, line loss and insertion loss are considered 
Power value of system N
The antenna optimization target power value of the system N 'is { N'1，N′2，……，N′IThe antenna optimization target power value of standard N' is { N "1，N”2，……，N”I}；
Therefore, in this embodiment, a minimum mean square error method is used to perform fine adjustment on power values (level values) of different systems, an adjustment value of the system N 'is preset to x', and an adjustment value of the system N ″ is preset to x ″, so that the adjustment targets are as follows:
for example, using a derivative method to solve the above formula, to ensure the mean square sum is minimal, the following equation can be obtained:
solving the equation can obtain x ' and x ', the power value of the convergent point P is adjusted to be P ' + x ' and P ' + x ', and the power value of each antenna system N ' is adjusted to be
Power value of system N' is adjusted to
And completing the forward optimization operation.
In the method of the embodiment, the reverse option part combines power, loss difference and the like, and determines connecting devices of different nodes by setting threshold requirements to form a whole distribution system; after the forward optimization part determines the devices, refined optimization adjustment is carried out, so that power values (namely level values) of different antennas in different systems are optimal.
As shown in fig. 6, fig. 6 shows an antenna design optimization apparatus for an indoor distribution system, and the apparatus of this embodiment includes: a determination unit 61, a power value acquisition unit 62, a device acquisition unit 63;
The determining unit 61 is configured to determine the type of the power divider connected between the first-stage nodes according to a preset number of antennas, a target power value of each antenna in each system, and a power loss value of the feeder; the first-stage node is a node formed by an antenna and a feeder line connected with the antenna;
the power value obtaining unit 62 is configured to obtain a power value of an mth level node according to the power value of the first level node; the Mth level node is a node formed by connecting the Mth-1 level node and the Mth-1 level node;
the device obtaining unit 63 is configured to obtain devices connected between the mth level nodes in a pre-reverse component selection manner according to the power value of the mth level node;
correspondingly, the power value obtaining unit 62 is further configured to obtain a power value of an M +1 th level node according to the power value of the M-th level node, where the M +1 th level node is a node formed by the M-th level node and a device connected to the M-th level node;
repeating the steps until the last level node is a device;
wherein M is a natural number of 2 or more.
Further, the above apparatus further includes an adjusting unit 64; the adjusting unit obtains the power value of each antenna in each system after the power value obtaining unit 62 obtains the power value of the last level node in each system; and adjusting the power values of the devices connected with all the nodes in a forward optimization mode, and taking the adjusted power value of each device as the target power value of each device.
The device of the embodiment improves the accuracy of level optimization calculation by combining two modes of reverse selection device and forward optimization, and is closer to a target value. The device considers the joint optimization problem of different systems, the optimization target values of different antennas can be set respectively according to the requirements, and the flexibility is high.
For example, when there are at least two systems, the determining unit 61 may be specifically configured to determine, for each system, a power value of the first-level node a in each system according to a formula one;
the formula I is as follows: the power value of the first-stage node A is equal to the target power value of the antenna and the power loss value of the feeder line;
grouping all the first-level nodes under each system according to the power value of the first-level node A in each system to obtain the grouping of the first-level nodes A under each system;
solving the intersection of all system groups to obtain a subset in the first-level node A set;
selecting the power divider type connected with all elements in each subset according to the number of the elements in each subset;
wherein the number of elements in each subset is less than or equal to 3.
When there is a standard, the determining unit 61 may be specifically configured to determine the power value of the first-level node a in the standard according to a formula one;
The formula I is as follows: the power value of the first-stage node A is equal to the target power value of the antenna and the power loss value of the feeder line;
grouping all first-level nodes under the system according to the power value of the first-level nodes A in the system to obtain groups of the first-level nodes A under the system, and taking the groups as subsets in a first-level node A set;
selecting the power divider type connected with all elements in each subset according to the number of the elements in each subset;
wherein the number of elements in each subset is less than or equal to 3.
Further, the device obtaining unit 63 may be specifically configured to sequentially select two mth-level nodes according to an arrangement order of the mth-level nodes, determine an absolute value of a power value difference of the two mth-level nodes in each system, and obtain an average value of absolute values corresponding to all systems;
judging whether the average value is smaller than a power divider selection threshold value X;
if the current value is less than the preset value, two power dividers are connected between the two Mth-level nodes;
otherwise, a coupler is connected between the two Mth-level nodes, and the difference between the absolute value of the power value difference between the straight-through end and the coupling end of the coupler and the average value is minimum;
and analogizing in sequence, and judging whether the number of the residual M-th level nodes is less than 2;
And if so, taking the rest M-th level nodes as M + 1-th level nodes to select corresponding devices.
The apparatus of this embodiment can perform any of the above method embodiments, as described in detail above, and will not be described in detail here.
When the device is used for designing the antenna scheme, the target power values of different antennas are set according to actual requirements, and then the design scheme can be optimized and updated according to the target values, so that the device is suitable for designing indoor distribution systems of various different systems such as GSM, TD-LTE and the like. The device can be suitable for the design of indoor distribution systems of TD-LTE, GSM and other systems, and belongs to the field of wireless communication.
As shown in fig. 7, fig. 7 shows an antenna design optimization apparatus for an indoor distribution system, and the apparatus of this embodiment includes: a processor (processor)71, a memory (memory)72, a communication Interface (Communications Interface)73, and a bus 74;
the processor 71, the memory 72 and the communication interface 73 complete mutual communication through the bus 74;
the communication interface 73 is used for information transmission between the apparatus and a communication device of the display apparatus;
the processor 71 is configured to call program instructions in the memory 72 to perform the methods provided by the above-mentioned method embodiments, including: determining the type of a power divider connected between the first-stage nodes according to the preset number of the antennas, the target power value of each antenna in each system and the power loss value of the feeder line; the first-stage node is a node formed by an antenna and a feeder line connected with the antenna;
Acquiring a power value of an Mth level node according to the power value of the first level node; the Mth level node is a node formed by connecting the Mth-1 level node and the Mth-1 level node;
acquiring devices connected between the M-level nodes in a pre-reverse component selection mode according to the power value of the M-level nodes;
acquiring the power value of the M +1 level node according to the power value of the M level node,
repeating the steps until the last level node is a device;
wherein M is a natural number of 2 or more.
The processor 71 is further configured to obtain a power value of each antenna in each system for the power value of the last-stage node in each system; and adjusting the power values of the devices connected with all the nodes in a forward optimization mode, and taking the adjusted power value of each device as the target power value of each device.
In the embodiment, the level of the room division design drawing is optimized in a mode of reverse component selection and forward optimization, so that component selection is realized, and the optimization precision is high; the method is suitable for joint optimization of different systems, can consider multi-system balance, and is particularly suitable for a multi-system co-construction scene;
particularly, the device can set different optimized target values aiming at different antennas, is particularly suitable for the conditions of different coverage requirements of different indoor areas, and has high flexibility; the implementation complexity is low, secondary power value optimization is performed after the device is selected, and the optimized power value is ensured to be further close to the target level value.
Those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.
Those skilled in the art will appreciate that the steps of the embodiments may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some or all of the components according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (9)
1. An antenna design optimization method for an indoor distribution system, comprising:
determining the type of a power divider connected between the first-stage nodes according to the preset number of the antennas, the target power value of each antenna in each system and the power loss value of the feeder line; the first-stage node is a node formed by an antenna and a feeder line connected with the antenna;
acquiring a power value of an Mth level node according to the power value of the first level node; the Mth level node is a node formed by connecting the Mth-1 level node and the Mth-1 level node;
acquiring devices connected between the M-level nodes in a pre-reverse component selection mode according to the power value of the M-level nodes;
acquiring a power value of an M +1 level node according to the power value of the M level node, wherein the M +1 level node is a node formed by the M level node and a device connected with the M level node;
repeating the steps until the last level node is a device;
wherein M is a natural number greater than or equal to 2;
the step of determining the type of the power divider connected between the first-stage nodes according to the preset number of the antennas, the target power value of each antenna in each system and the power loss value of the feeder line comprises the following steps:
When at least two systems exist, determining the power value of a first-level node under each system according to a formula I for each system;
the formula I is as follows: the first-stage node power value is equal to the target power value of the antenna and the power loss value of the feeder line;
grouping all the first-level nodes under each system according to the power value of the first-level nodes in each system to obtain the grouping of the first-level nodes under each system;
solving the intersection of all system groups to obtain a subset in the first-level node set;
selecting the power divider type connected with all elements in each subset according to the number of the elements in each subset;
wherein the number of elements in each subset is less than or equal to 3.
2. The method of claim 1, further comprising:
aiming at the power value of the last level node in each system, acquiring the power value of each antenna in the system;
and adjusting the power values of the devices connected with all the nodes in a forward optimization mode, and taking the adjusted power value of each device as the target power value of each device.
3. The method according to claim 1, wherein the step of determining the type of the power divider connected between the first-stage nodes according to the preset number of antennas, the target power value of each antenna in each system, and the power loss value of the feeder line further comprises:
When one system exists, determining the power value of a first-level node under the system according to a formula I;
the formula I is as follows: the first-stage node power value is equal to the target power value of the antenna and the power loss value of the feeder line;
grouping all first-level nodes in the system according to the power value of the first-level nodes in the system to obtain groups of the first-level nodes in the system, and taking the groups as subsets in a first-level node set;
selecting the power divider type connected with all elements in each subset according to the number of the elements in each subset;
wherein the number of elements in each subset is less than or equal to 3.
4. A method according to claim 1 or 3, wherein if the number of elements in the subset is 2, two elements in the subset are connected to two output terminals of the two power dividers;
if the number of the elements in the subset is 3, connecting the three elements in the subset with three output ends of the three-power divider;
and if the number of the elements in the subset is 1, taking the elements as the next-level nodes to select corresponding devices.
5. The method of claim 4, wherein the step of obtaining the power value of the mth level node from the power value of the first level node comprises:
When M is 2, determining the power value of the second-level node according to a formula II for each system;
the formula II is as follows: the power value of the second-stage node is (the power loss value of the two power dividers is 2+ the power value of two first-stage nodes connected with the two power dividers)/2;
alternatively, the first and second electrodes may be,
the formula II is as follows: the power value of the second-stage node is (the power loss value of the three-power divider is 3+ and is connected with two first-stage nodes of the two-power divider)/3;
and if the first-stage node is not connected with the device, the power value of the first-stage node which is not connected with the device is used as the power value of the second-stage node.
6. The method according to claim 4, wherein the step of obtaining the devices connected between the M-th nodes in a pre-reverse option manner according to the power value of the M-th node comprises:
sequentially selecting two Mth-level nodes according to the arrangement sequence of the Mth-level nodes, determining the absolute value of the power value difference of the two Mth-level nodes under each system, and acquiring the average value of the corresponding absolute values under all systems;
judging whether the average value is smaller than a preset power divider selection threshold value or not;
if the current value is less than the preset value, two power dividers are connected between the two Mth-level nodes;
otherwise, a coupler is connected between the two Mth-level nodes, and the difference between the absolute value of the power value difference between the straight-through end and the coupling end of the coupler and the average value is minimum;
And analogizing in sequence, and judging whether the number of the residual M-th level nodes is less than 2;
and if so, taking the rest M-th level nodes as M + 1-th level nodes to select corresponding devices.
7. The method of claim 2, wherein the step of obtaining the power value of each antenna in each standard for the power value of the last node in each standard comprises:
if two systems exist, the power value of the last-stage node P in the first system is P 'and the power value P' in the second system, and the power value of each antenna in the first system is obtained according to the power value of the middle-stage node and the power value of the insertion loss
Power value under second mode
Correspondingly, the step of adjusting the power values of the devices connected to all the nodes by adopting a forward optimization mode and taking the adjusted power value of each device as the target power value of each device comprises the following steps:
obtaining an adjusting parameter x 'under a first manufacturing mode and an adjusting parameter x' under a second manufacturing mode by adopting a formula III;
the formula III is as follows:
according to the adjustment parameter x 'under the first mode and the adjustment parameter x' under the second mode, the power value of the last-stage node P under the first mode is adjusted to be P '+ x', and the functional value under the second mode is adjusted to be P '+ x'; and
Adjusting the power level of each antenna in the first mode to
The power value under the second mode is adjusted to
Correspondingly adjusting the power value of each device between the antenna and the last-stage node;
wherein, I is a preset total number of antennas, N' is an antenna optimization target power value of a first system, and N ″ is an antenna optimization target power value of a second system.
8. The method of claim 1, wherein the device connected between the mth stage nodes is a two-way power divider or coupler;
and the device connected between the M +1 stage nodes is a two-power divider or a coupler.
9. An apparatus for optimizing antenna design for an indoor distribution system, comprising:
the determining unit is used for determining the type of the power divider connected between the first-stage nodes according to the preset number of the antennas, the target power value of each antenna in each system and the power loss value of the feeder line; the first-stage node is a node formed by an antenna and a feeder line connected with the antenna;
the power value obtaining unit is used for obtaining the power value of the Mth level node according to the power value of the first level node; the Mth level node is a node formed by connecting the Mth-1 level node and the Mth-1 level node;
The device acquisition unit is used for acquiring devices connected between the M-level nodes in a pre-reverse component selection mode according to the power value of the M-level nodes;
the power value obtaining unit is further configured to obtain a power value of an M +1 th level node according to the power value of the M-th level node, where the M-th level node is a node formed by the M-1 th level node and a device connected to the M-1 th level node;
repeating the steps until the last level node is a device;
wherein M is a natural number greater than or equal to 2;
the determining the type of the power divider connected between the first-stage nodes according to the preset number of the antennas, the target power value of each antenna in each system and the power loss value of the feeder line comprises the following steps:
when at least two systems exist, determining the power value of a first-level node under each system according to a formula I for each system;
the formula I is as follows: the first-stage node power value is equal to the target power value of the antenna and the power loss value of the feeder line;
grouping all the first-level nodes under each system according to the power value of the first-level nodes in each system to obtain the grouping of the first-level nodes under each system;
solving the intersection of all system groups to obtain a subset in the first-level node set;
Selecting the power divider type connected with all elements in each subset according to the number of the elements in each subset;
wherein the number of elements in each subset is less than or equal to 3.
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